1 2 /* 3 * Copyright 2011 Google Inc. 4 * 5 * Use of this source code is governed by a BSD-style license that can be 6 * found in the LICENSE file. 7 */ 8 #include "SampleCode.h" 9 #include "SkView.h" 10 #include "SkCanvas.h" 11 #include "SkCornerPathEffect.h" 12 #include "SkCullPoints.h" 13 #include "SkGradientShader.h" 14 #include "SkPath.h" 15 #include "SkRegion.h" 16 #include "SkShader.h" 17 #include "SkUtils.h" 18 19 static void create_bitmap(SkBitmap* bitmap) { 20 const int W = 100; 21 const int H = 100; 22 bitmap->allocN32Pixels(W, H); 23 24 SkCanvas canvas(*bitmap); 25 canvas.drawColor(SK_ColorRED); 26 SkPaint paint; 27 paint.setColor(SK_ColorBLUE); 28 canvas.drawCircle(SkIntToScalar(W)/2, SkIntToScalar(H)/2, SkIntToScalar(W)/2, paint); 29 } 30 31 class WritePixelsView : public SampleView { 32 SkPath fPath; 33 public: 34 WritePixelsView() {} 35 36 protected: 37 // overrides from SkEventSink 38 virtual bool onQuery(SkEvent* evt) { 39 if (SampleCode::TitleQ(*evt)) { 40 SampleCode::TitleR(evt, "WritePixels"); 41 return true; 42 } 43 return this->INHERITED::onQuery(evt); 44 } 45 46 virtual void onDrawContent(SkCanvas* canvas) { 47 SkBitmap bitmap; 48 create_bitmap(&bitmap); 49 int x = bitmap.width() / 2; 50 int y = bitmap.height() / 2; 51 52 SkBitmap subset; 53 bitmap.extractSubset(&subset, SkIRect::MakeXYWH(x, y, x, y)); 54 55 canvas->translate(SkIntToScalar(20), SkIntToScalar(20)); 56 57 canvas->writePixels(bitmap, 0, 0); 58 canvas->writePixels(subset, 0, 0); 59 } 60 61 private: 62 typedef SampleView INHERITED; 63 }; 64 65 ////////////////////////////////////////////////////////////////////////////// 66 67 static SkView* MyFactory() { return new WritePixelsView; } 68 static SkViewRegister reg(MyFactory); 69
